import { ObjectDirective } from "vue";

const longPress: ObjectDirective = {
  mounted(el: any, binding: any, vNode: any) {
    // 确保提供的表达式是函数
    const {handler:handleFun,params} =binding.value
    if (typeof handleFun !== 'function') {
      // 获取组件名称
      const compName = vNode.context.name;
      let warn = `[longpress:] provided expression '${binding.expression}' is not a function, but has to be`;
      if (compName) { warn += `Found in component '${compName}'`; }

      console.warn(warn);
    }

    // 定义变量
    let pressTimer: any = null;

    // 创建计时器（ 1秒后执行函数 ）
    let start = (e: any) => {
      if (e.type === 'click' && e.button !== 0) {
        return;
      }

      if (pressTimer === null) {
        pressTimer = setTimeout(() => {
          // 执行函数
          handler();
        }, 1000);
      }
    }

    // 取消计时器
    let cancel = () => {
      if (pressTimer !== null) {
        clearTimeout(pressTimer);
        pressTimer = null;
      }
    }

    // 运行函数
    const handler = () => {
      binding.value.handler(params);
    }

    // 添加事件监听器
    el.addEventListener('mousedown', start);
    el.addEventListener('touchstart', start);
    el.addEventListener('click', cancel);
    el.addEventListener('mouseout', cancel);
    el.addEventListener('touchend', cancel);
    el.addEventListener('touchcancel', cancel);
  }
};

export default longPress;